Show your Benjolin / Zeitgeist

macumbista · Posted: Mon Apr 09, 2012 4:27 pm Post subject:

Here's mine, done over Easter weekend. I pulled all the outputs and inputs to bananas, and I'm very happy with the extra self-modulation/chaos possibilities. Also added ground to interface with modular and put red, blue and green LEDs for the Rungler bits. Oh yeah, and a speaker so I can make some money every time I ride the U-Bahn. Videos tomorrow on my website hopefully. Looking forward to building Casper-influenced double-Benjolin modular, or at least some shift-register-based, Rungler-type pseudo-randomizers. Until then...

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macumbista · Posted: Fri Apr 13, 2012 2:48 am Post subject:

cryptography (study I) from macumbista on Vimeo.

The "Cryptography Studies" examine the use of simple analog implementations of pseudo-random number generators, akin to those used in encryption algorithms, for the chaotic production of sound patterns. One of the simplest pseudo-random number generators is a three-stage shift register with a non-linear feedback loop, such as that found in Rob Hordijk's "Benjolin" instrument design.

This one was built over Easter weekend 2012 as a starting point for further research on the topic. I have focused on the chaotic zones which occur when new parameters have been set by the controls or feedback patching, before the machine settles into a steady state and predictable pattern.

You can read my extended musings on the relationship of cryptography and music here:

macumbista.net/?p=2697

wilnix · Joined: Feb 27, 2011 Posts: 1 Location: nl

Some nice builds here, mine finally got a proper housing.

I built a Benjolin at the Worm workshop, 26 February 2011

When I was looking for a housing I decide to make a portable base unit that can be used for other (Home made, Circuit Bend) instruments.
I build the Benjolin, into a old tape deck housing with speakers together with a Philips sound-mixer and a guitar amp (crate profile 5), it has 3 channels one for the Benjolin one no-input-feedback mixer and one for anther build-in gadget (maybe a APC or radio device I don't know yet) for now its just a input and a knob to switch each channel to an external input.

I built a patch bay for audio in, sent and return and a patch bay for the CV ins and outs from the Benjolin and there is some room a few extra patchable potmeters. The audio is going thru the sound mixer (echo and and bass treble control) and thru the amp effects. A I am also planing to make a (mini)stereo mixer to the line in from the profiler 5. The profiler has a build in usb sound card.

And after al it is still a guitar amp so I can plug in my 'homeswinger" build in another workshop at Worm given by Yuri Landman.

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oberkorn · Joined: Nov 05, 2009 Posts: 15 Location: oberkorn

macumbista · Posted: Mon Oct 01, 2012 3:15 am Post subject:

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A kind of super-Benjolin... “Catjar in the Rye” (or “Betty”, as she is know to her friends) is an experimental sound instrument built for Swedish composer Andreas Catjar. It combines a chaotic Benjolin synthesizer, extreme fuzz distortion unit, a speaker/contact-mic feedback system and “circuit-bending”-style body contacts into one rugged flightcase. The Benjolin features several modifications, including patchable routing banana jacks, LED lights for the three stages of its analog shift register and an external audio input.

My thanks go out to Rob Hordijk for providing this circuit, and to Pete Edwards/Casper Electronics for his help in working out the modifications.

More info here: http://macumbista.net/?p=2979

mosc · Posted: Mon Oct 01, 2012 12:19 pm Post subject:

macumbista

After the October 12, 2012 premier performance, maybe you could post an audio file here. I'd love to hear what that beautiful instrument sounds like.

Beautiful work... thumb up

blue_lu · Joined: Nov 16, 2009 Posts: 32 Location: Germany

is there a source for these pro made pcbs?

macumbista · Posted: Wed Dec 19, 2012 10:33 am Post subject:

urm, never mind....

macumbista · Posted: Sun Dec 23, 2012 4:39 pm Post subject:

Actually, I didn't notice the double-sided pro boards in this thread before, also curious of the source...

fluxmonkey · Joined: Jun 24, 2005 Posts: 708 Location: cleve

new zeitgeist. awesome audiofuckery. modified the board layout to allow for mounting the pots on the front or the back. NOTE: the footprint of the 1702 regulator is NOT THE SAME as a standard 7805... released some majic smoke finding that out, check your data sheets. gonna live with it for a bit, but may add an attenuator on the cv in, could use a little taming

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macumbista · Posted: Tue Sep 17, 2013 3:53 pm Post subject:

Two of the Benjolins I've been doing as commissions, having outer-space intercourse....

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VIDEO: https://vimeo.com/70111383

dougseidel · Joined: Feb 10, 2010 Posts: 74 Location: NJ

My double benjolin - need to fix up the labeling etc.

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sduck · Posted: Thu Jan 02, 2014 7:45 pm Post subject:

My first venture into this particular forum!

Here's a dual benjolin I put together. In MOTM modular format.

Not quite done yet, it still needs led drivers

macumbista · Posted: Mon Feb 03, 2014 3:37 pm Post subject:

Dual "Butterfly" Benjolin made for a customer. Two Benjolins cross-modulating is just about the best kind of chaos in the world! I have materials to make one more, pls get in touch if you are interested.

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macumbista · Posted: Sat Mar 01, 2014 4:52 pm Post subject:

Latest version of the Macumbista Benjolin V3 2014. I am offering these for sale if anyone is interested. Info: http://macumbista.net/?p=3935

macumbista · Posted: Sun Mar 09, 2014 1:08 pm Post subject:

Finished a dual "Butterfly" Benjolin literally two hours before a trans-Atlantic flight to Texas. This one is mine, but I can make one for you if you ask real nice...

macumbista · Posted: Tue Mar 18, 2014 8:10 am Post subject:

A Static Environment for Complementary Instabilities from macumbista on Vimeo.

A Static Environment for Complementary Instabilities

++dual butterfly benjolin++chaotic feedback++
++symmetrical patching++high resonance++
++total harmonic distortion++
++no changes++no cuts++
++get hypnotized++

18 march 2014

fluxmonkey · Joined: Jun 24, 2005 Posts: 708 Location: cleve

steve from Telecult Powers got my first Zeitgeist, and the wife appropriated my Benjolin, so i had to replace 'em. The modules, not the friends & family.

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Repeater · Joined: Mar 19, 2011 Posts: 13 Location: Rochester

Here's my Double Benjolin.
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blue hell · Posted: Wed Feb 04, 2015 5:45 pm Post subject:

modulator_esp · Posted: Wed Feb 04, 2015 6:40 pm Post subject:

very nice

Starspawn · Joined: Jun 14, 2013 Posts: 85 Location: Oslo

Heres my Benjolin in Euro.
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With most of the Caspar mods. [/img]

L´Andratté · Posted: Sun Mar 15, 2015 12:40 pm Post subject:

fluxmonkey · Joined: Jun 24, 2005 Posts: 708 Location: cleve

L´Andratté · Posted: Sun Mar 15, 2015 1:08 pm Post subject:

Nice.I´m currently planning on building a dual benjolin in a nice metal box I found. Will bring out all inputs and outputs to the front.

I figured stuff like if both 4021s are chained in series and clocked from the same osc, the output of the 2nd 4021 will be a delayed version of the first, could yield interesting arabesques. And much more. Inspiring circuit!

EDIT: actually Rob describes just that in this threadhttp://electro-music.com/forum/topic-41489.html